index.css

/* Basic styles for the navbar */
* {
    padding: 0;
    margin: 0;
    /* box-sizing: border-box; */
    text-decoration: none;
    list-style: none;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background-color: #3a1505; 
    z-index: 1000;
}

label.logo {
    font-size: 35px;
    font-weight: bold;
    color: white;
    padding: 0 100px;
    line-height: 70px;
}

nav ul {
    float: right;
    margin-right: 40px;
}

nav li {
    display: inline-block;
    margin: 0 8px;
    line-height: 70px;
}

nav a {
    color: white;
    font-size: 18px;
    text-transform: uppercase;
    border: 1px solid transparent;
    padding: 7px 10px;
    border-radius: 3px;
}

a.active,
a:hover {
    border: 1px solid white;
    transition: .5s;
}

nav #icon {
    color: white;
    font-size: 29px;
    line-height: 75px;
    float: right;
    margin-right: 40px;
    cursor: pointer;
    display: none;
}

@media (max-width: 1048px) {
    label.logo {
        font-size: 32px;
        padding-left: 60px;
    }

    nav ul {
        margin-right: 20px;
    }

    nav a {
        font-size: 17px;
    }
}

@media (max-width: 909px) {
    nav #icon {
        display: block;
    }

    nav ul {
        position: fixed;
        width: 100%;
        height: 100vh;
        background: #3e231b;
        top: 80px;
        left: -100%;
        text-align: center;
        transition: all .5s;
    }

    nav li {
        display:block;
        margin: 50px 0;
        line-height: 30px;
    }

    nav a {
        font-size: 20px;
    }

    a.active,
    a:hover {
        border: none;
        color: #3498db;
    }

    nav ul.show {
        left: 0;
    }
}

section {
    background: url('coffee3.webp') ;
    background-size: cover;
    object-fit: cover;
    height: 100vh;
    width: 100vw;
}

/* Styles for when a menu item is hovered over */
.menu a:hover {
    color: #3dd5fa;
}

/* Styles for when the menu is scrolled */
.scrolled {
background-color: #7a402b; 
/* Change background color when scrolled */
box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1); 
/* Add a shadow on scroll */
}